Amend and clarify the law on the medical use of cannabis (marijuana) so that qualifying patients and designated providers who comply with thelaw will not be subject to arrest or prosecution, other criminal sanctions, or civil consequences based solely on their medical use of cannabis; and that patients will have access to an adequate, safe, consistent, and secure source of medical quality marijuana. The bill defines, and clarifies the provisions related to prescribing, selling, and using medical marijuana. This bill provides that up to three persons may participate in a collective garden; health care professionals may not have a practice primarily for prescribing medical marijuana; health care professionals may only prescribe medical marijuana to patients with whom they have a documented relationship; the Department of Health must adopt rules regarding the amount of cannibis that may be kept at a single dispensary; advertising to the public by dispensaries is prohibited; the DOH must maintain a registry of licensees and patients; licensed dispensaries must be approved by local jurisdictions; and, licensed dispensaries must be non-profit organizations.